A few years before he wen t on to make a  big splash  in the cann ibal sub-genre , Ruggero Deodato di rected this su ccessful rip-of f of Ro man Polanski&# 039;s brilli ant Knife in t he Water. Nat urally, bei ng an Itali an film - there 's more of a focus  on sex than t he relation ship bet ween th e centra l couple s, but the claustro phobic at mosphere and entertaining c haracters help to keep the tens ion... (展开全部) A few years before h e went on  to make a big  splash in t he canniba l sub-genre , Ruggero Deo dato direc ted this suc cessful rip-off of Rom an Pola nski&#0 39;s brill iant Knife in  the Water. Naturally,  being an Itali an film - th ere's mo re of a foc us on se x than the relationship b etween the c entral  couples, but t he claus trophob ic atmosphere a nd entertai ning ch aracters he lp to keep th e tension bubb ling over, whi ch ensur es that th e movie is i nteresting for the dura tion. The  film doesn 't h ave nearly as much 'bite ' as Canni bal Holocau st and most  of the  rest of Ru ggero Deodato&# 039;s filmograp hy, but it&#03 9;s obvious that even with this ea rly film; Deod ato is a direc tor with the  potential to  make a mark on cinema. The  plot is s imple in that  it just fo cuses on two couples. George and  Silvia invite Irem and B arbara f or a weekend  cruise on their ya cht. It so on transpi res that George isn&#03 9;t the most sensitive man to ever  live, and  Silvia doesn 't seem to m ind him treat ing her badly. The situa tion escalates , and Irem and Barbara  join forces with Silvia f or vengeance a gainst Geo rge...and t hree way sex,  of course. ！